8.7 HW Solving Quadratics by Square Roots

Solve using square roots.

• A
• B
• C
• D

Solve using square roots.

• A
• B
• C
• D

Solve using square roots.
k² - 6 = 43

• k = √37
• k = 37 or - 37
• k = 7, k = -7
• no solution

Solve using square roots.
5b² - 4 = 41

• b = 9, b = -9
• b = 3, b = -3
• b = 8, b = -8
• no solution

• No real solution

• No solution

TRUE OR FALSE:

The solutions, roots, x-intercepts, and zeros of a quadratic equation are all the same thing.

• True

• False, because the solution and root are the same but the x-intercept and zero are different

• False, because the x-intercept and root are the same but the zero and solution are different

• False, they are all different

Solve: 4x² - 1 = 48

• x = 7/2 or -7/2
• x = 2/7 or -2/7
• x = 49/4 or -49/4
• x = 47/4 or -47/4

Solve for x
3x² = -60

• ±2i√5
• √20
• √60
• ±√30

Which is a solution to 3x² + 2 = 0

• 1
• (√6/3)i
• (⅔)i
• ⅔